Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/60979
Title: Loading-rate-independent delay of catastrophic avalanches in a bulk metallic glass
Authors: Chen, SH
Chan, KC 
Wang, G
Wu, FF
Xia, L
Ren, JL
Li, J
Dahmen, KA
Liaw, PK
Issue Date: 2016
Source: Scientific reports, 25 2016, v. 6, no. , p. 1-13
Abstract: The plastic flow of bulk metallic glasses (BMGs) is characterized by intermittent bursts of avalanches, and this trend results in disastrous failures of BMGs. In the present work, a double-side-notched BMG specimen is designed, which exhibits chaotic plastic flows consisting of several catastrophic avalanches under the applied loading. The disastrous shear avalanches have, then, been delayed by forming a stable plastic-flow stage in the specimens with tailored distances between the bottoms of the notches, where the distribution of a complex stress field is acquired. Differing from the conventional compressive testing results, such a delaying process is independent of loading rate. The statistical analysis shows that in the specimens with delayed catastrophic failures, the plastic flow can evolve to a critical dynamics, making the catastrophic failure more predictable than the ones with chaotic plastic flows. The findings are of significance in understanding the plastic-flow mechanisms in BMGs and controlling the avalanches in relating solids.
Publisher: Nature Publishing Group
Journal: Scientific reports 
EISSN: 2045-2322
DOI: 10.1038/srep21967
Rights: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
The following publication Chen, S. H. et al. Loading-rate-independent delay of catastrophic avalanches in a bulk metallic glass. Sci. Rep. 6, 21967 (2016) is available at https://dx.doi.org/10.1038/srep21967
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